Coaxial connector with inhibited ingress and improved grounding

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of, and priority to U.S. Provisional Patent Application No. 61/323,597 filed on Apr. 13, 2010 entitled, “Coaxial Connector With Inhibited Ingress and Improved Grounding”, the content of which is relied upon and incorporated herein by reference in its entirety.

BACKGROUND

1. Field

The disclosure relates generally to coaxial cable connectors, and particularly to coaxial cable connectors capable of connecting a coaxial cable to a terminal.

2. Technical Background

With the advent of digital signal in CATV systems, a rise in customer complaints due to poor picture quality in the form of signal interference resulting in what is known as “tiling” and the like has occurred. Complaints of this nature result in CATV system operators having to send a technician to address the issue. Frequently, it is reported by the technician that the cause of the problem is a loose F connector fitting. Type F connector fittings may be loose for many reasons, sometimes they are not properly tightened due to installation rules of system operators that prohibit the use of wrenches in-doors on customer equipment. Other times, a homeowner may relocate equipment after the technician departs and may not adequately secure the F connectors. Additionally, some claim that F connector couplers loosen due to vibration and/or heat and cold cycles.

In any event, an improperly installed connector may result in poor signal transfer because there are discontinuities along the electrical path between the devices, resulting in a leak of radio frequency (“RF”) signal. That leak may be in the form of signal egress where the RF energy radiates out of the connector/cable arrangement. Alternately, an RF leak may be in the form of signal ingress where RF energy from an external source or sources may enter the connector/cable arrangement causing a signal to noise ratio problem resulting in an unacceptable picture.

F connectors typically rely on intimate contact between the F male connector interface and the F female connector interface. If for some reason, the connector interfaces are allowed to pull apart from each other, such as in the case of a loose F male coupler, an interface “gap” may result. This gap can be a point of an RF leak as previously described. Typically, in such situations where the F male coupler is loose, the configuration allows for two distinct signal ingress paths. One path is found from the “back” of the F male coupler between the coupler bore and connector body. When the coupler is loosened, the connector body is permitted to move about, creating gaps that were previously secured when the connection was tight. Typically, these gaps allow a signal path along a relatively straightforward line. The other path is found at the “front” of the F male coupler along the spiral path of the interconnecting thread system. In the loose condition, tolerances in the thread system allow signal ingress because the flanks of the treads are not intimately engaged enough to provide adequate shielding.

To at least partially address the signal ingress and grounding issues, a number of approaches have been introduced, including U.S. Pat. No. 7,114,990 (Bence, et al.); U.S. Pat. No. 7,479,035 (Bence, et al.); U.S. Pat. No. 6,716,062 (Palinkas, et al.) and US Patent application 2008/0102696 (Montena). In addition, other approaches have been introduced to at least partially address the issue of loosening Type F couplers, including a lock-washer design produced by Phoenix Communications Technologies International (PCT) known at the DRS and TRS connectors. However, there is a continuing need for improved connector designs that address theses issues simultaneously.

SUMMARY

One embodiment of the disclosure relates to a coaxial connector for coupling an end of a coaxial cable to a terminal. The coaxial connector includes a hollow body having a front end, a rear end, and an internal surface extending between the front end and the rear end, the internal surface defining a longitudinal opening. The coaxial connector also includes a tubular post disposed at least partially within the longitudinal opening of the hollow body. The tubular post includes a front end, a rear end, a tubular shank adjacent to the rear end, and a flange adjacent to the front end, wherein the flange has an outer diameter that is larger than the outer diameter of the tubular shank. In addition, the coaxial connector includes a coupling nut having a front end, and a rear end, and a radially inward directed collar with a circular aperture formed therein. The circular aperture has a diameter that is less than the outer diameter of the flange of the tubular post and a front end facing surface of the radially inward directed collar rotationally engages a rear end facing surface of the flange of the tubular post. The coaxial connector further includes a sealing member disposed between a rear end facing surface of the radially inward directed collar and a front end facing surface of the hollow body. The sealing member is axially compressed by the rear end facing surface of the radially inward directed collar and the front end facing surface of the hollow body.

Additional features and advantages will be set forth in the detailed description which follows, and in part will be readily apparent to those skilled in the art from the description or recognized by practicing the embodiments as described in the written description and claims hereof, as well as the appended drawings.

It is to be understood that both the foregoing general description and the following detailed description are merely exemplary, and are intended to provide an overview or framework to understand the nature and character of the claims.

The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiment(s), and together with the description serve to explain principles and operation of the various embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

<figref idref="DRAWINGS">FIG. 1</figref> illustrates a partial cross sectional view of a prior art connector in a state of proper engagement with a terminal or port;

<figref idref="DRAWINGS">FIG. 2</figref> illustrates a partial cross sectional view of the connector illustrated in <figref idref="DRAWINGS">FIG. 1</figref> in a state of improper engagement (otherwise known as “loose”) with a terminal or port;

<figref idref="DRAWINGS">FIG. 3</figref> illustrates a partial cross sectional view of an alternative prior art connector in an uninstalled condition to illustrate o-ring utilization;

<figref idref="DRAWINGS">FIG. 4</figref> illustrates a partial cross sectional view of a connector disclosed herein installed on a coaxial cable;

<figref idref="DRAWINGS">FIG. 4A</figref> illustrates an enlarged view of a portion of the connector illustrated in <figref idref="DRAWINGS">FIG. 4</figref>;

<figref idref="DRAWINGS">FIG. 5</figref> illustrates a partial cross sectional view of the connector of <figref idref="DRAWINGS">FIG. 4</figref> installed on a coaxial cable and fully secured to a terminal or port;

<figref idref="DRAWINGS">FIG. 6</figref> illustrates a partial cross sectional view of the connector of <figref idref="DRAWINGS">FIG. 4</figref> installed on a coaxial cable and partially secured to a terminal or port;

<figref idref="DRAWINGS">FIG. 7</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector comprising an alternate ground member and installed on a coaxial cable and fully secured to a terminal or port;

<figref idref="DRAWINGS">FIG. 7A</figref> illustrates side perspective and schematic end views of the alternate ground member shown on the connector illustrated in <figref idref="DRAWINGS">FIG. 7</figref>;

<figref idref="DRAWINGS">FIG. 8</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector comprising a coupling nut having an offset thread and installed on a coaxial cable and fully secured to a terminal or port;

<figref idref="DRAWINGS">FIG. 8A</figref> illustrates a posterior schematic end view of the connector illustrated in <figref idref="DRAWINGS">FIG. 8</figref>;

<figref idref="DRAWINGS">FIG. 9</figref> illustrates a partial cross sectional view of the connector of <figref idref="DRAWINGS">FIG. 4</figref> with an optional torque aid installed;

<figref idref="DRAWINGS">FIG. 10</figref> illustrates a schematic end view of the optional torque aid illustrated in <figref idref="DRAWINGS">FIG. 9</figref>;

<figref idref="DRAWINGS">FIG. 11</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector comprising a modified post;

<figref idref="DRAWINGS">FIG. 11A</figref> illustrates an anterior schematic end view of the post illustrated in <figref idref="DRAWINGS">FIG. 11</figref>;

<figref idref="DRAWINGS">FIG. 12</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector comprising a sealing member disposed between the coupler, post, and body;

<figref idref="DRAWINGS">FIG. 13</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector having a coupling nut having a radially inwardly biased front end and a plurality of slots; and

<figref idref="DRAWINGS">FIG. 14</figref> illustrates a schematic front end view of an alternate embodiment of a coupling nut having an at least partially unrounded inner surface.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference will now be made in detail to embodiments of coaxial connectors, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

Referring to <figref idref="DRAWINGS">FIG. 1</figref>, a prior art coaxial connector <b>10</b> has a coupling nut <b>20</b>, a post <b>30</b>, a body <b>50</b>, and a compression ring <b>55</b>. The coaxial connector <b>10</b> is an axial-compression type coaxial connector and the connection of the coaxial connector <b>10</b> to a coaxial <b>11</b> cable is known in the art. The coaxial connector <b>10</b> is illustrated in <figref idref="DRAWINGS">FIG. 1</figref> in its attached, compressed state. When properly tightened to port <b>40</b>, the gap “G” between post face <b>32</b> and port face <b>42</b> is completely closed. In other words, post face <b>32</b> and port face <b>42</b> are in intimate contact.

<figref idref="DRAWINGS">FIG. 2</figref> illustrates coaxial connector <b>10</b> and port <b>40</b> of <figref idref="DRAWINGS">FIG. 1</figref>, wherein coupling nut <b>20</b> of connector <b>10</b> is not fully tightened thereby allowing post face <b>32</b> and port face <b>42</b> to be spaced apart at gap “G”. The resultant gap “G” and clearances between internal features of coupler <b>20</b> and body <b>50</b> result in a relatively unobstructed ingress path “P<b>1</b>”. RF (Radio Frequency) signal ingress travels along this path into the connector interface allowing undesirable electrical interference. The RF ingress path is unimpeded by non-conductive materials such as o-ring <b>57</b>. A secondary ingress path “P<b>2</b>” is created when the internal threaded portion of coupler <b>20</b> is not loaded against external threaded portion of port <b>40</b>. Said secondary ingress path “P<b>2</b>” is abetted by relatively large mechanical clearances between pilot bore <b>21</b> of coupler <b>20</b> and external surfaces of port <b>42</b>. Body <b>50</b> and post <b>30</b> of connector <b>10</b> are permitted to angle away from a fully axial alignment with port <b>42</b> causing body <b>50</b> and post <b>30</b> to have limited, incidental contact with coupler <b>20</b> resulting in an undependable, limited number of points electrical ground path.

<figref idref="DRAWINGS">FIG. 3</figref> illustrates a partial cross sectional view of an alternative prior art connector in an uninstalled condition illustrating o-ring utilization known and practiced in the art. O-ring <b>80</b> is compressed radially as illustrated at “A” (as opposed to being compressed axially) and is conventionally used as a moisture barrier. O-ring <b>80</b> is allowed axial clearance in order to ensure rotatability of coupler <b>120</b>. This necessary clearance allows limited axial movement of coupler <b>120</b> and permits gapping between annular shoulder <b>121</b> of coupler <b>120</b> and annular shoulder <b>122</b> of post <b>123</b>. Said gapping results in a situation for a relatively unobstructed ingress path as previously described.

<figref idref="DRAWINGS">FIG. 4</figref> illustrates a partial cross sectional view of a coaxial connector <b>150</b> as disclosed herein installed on a coaxial cable <b>11</b>. Coaxial connector <b>150</b> includes coupling nut <b>160</b>, post <b>170</b>, sealing member <b>180</b>, and body <b>190</b>. Coupling nut <b>160</b>, post <b>170</b>, and body <b>190</b> are preferably made from a metallic material, such as brass and may optionally be plated with a conductive, corrosion-resistant material, such as nickel or tin.

Body <b>190</b> is preferably a hollow body having a front end <b>192</b>, a rear end <b>194</b>, and an internal surface (not shown) extending between the front and the rear end, wherein the internal surface defines a longitudinal opening.

Post <b>170</b> is preferably a tubular post disposed at least partially within the longitudinal opening of the body <b>190</b>. Post <b>170</b> includes a front end <b>172</b> (including a forward facing post face), a rear end <b>202</b>, a tubular shank <b>200</b> adjacent to the rear end <b>202</b>, and a flange <b>174</b> adjacent to the front end <b>172</b>, wherein the flange <b>174</b> has an outer diameter that is larger than the outer diameter of the tubular shank <b>200</b>.

Coupling nut <b>160</b> includes a front end <b>162</b>, and a rear end <b>164</b>, and a radially inward directed collar <b>166</b> with a circular aperture formed therein. The circular aperture formed in the radially inward directed collar <b>166</b> has a diameter that is less than the outer diameter of the flange <b>174</b> of the post <b>170</b>. A front end facing surface <b>165</b> of the radially inward directed collar <b>166</b> rotationally engages a rear end facing surface <b>175</b> of the flange <b>174</b> of the post <b>170</b>.

Sealing member <b>180</b> is disposed between a rear end facing surface <b>163</b> of the radially inward directed collar <b>166</b> and a front end facing surface <b>195</b> of the body <b>190</b>. Sealing member <b>180</b> is preferably an o-ring that is preferably made from an elastomer material, such as EPDM (Ethylene Propylene Diene Monomer).

As illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, internal features of coupling nut <b>160</b> and body <b>190</b> define an annular space to house sealing member <b>180</b>. This annular space is configured to pre-load sealing member <b>180</b> in an axial fashion indicated by “A” (in contrast to prior art utilization of the o-ring as illustrated in <figref idref="DRAWINGS">FIG. 3</figref>). Alternatively stated, sealing member <b>180</b> is axially compressed by the rear end facing surface <b>163</b> of the radially inward directed collar <b>166</b> and the front end facing surface <b>195</b> of the body <b>190</b>. While the sealing member <b>180</b> performs an environmental sealing function, it now also serves to urge coupling nut <b>160</b> forward against post flange <b>174</b> to aid in electrical grounding. This, in conjunction with precision engineered fits between coupling nut <b>160</b>, post <b>170</b>, and body <b>190</b> restricts RF signal ingress paths from the rear of the connector coupler system. The increased convoluted RF ingress path “P” defined by the juxtaposition of coupling nut <b>160</b>, post <b>170</b>, and body <b>190</b> serves as a further barrier against RF signal ingress.

As further illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, front end <b>192</b> and front end facing surface <b>195</b> of body <b>190</b> have a larger outer diameter than an outer diameter of the sealing member <b>180</b>. In addition, to the rear of the radially inward directed collar <b>166</b>, the coupling nut <b>160</b> includes a rearward extending annular portion <b>168</b> having a circular aperture formed therein. The circular aperture in the rearward extending annular portion <b>168</b> has a diameter that is greater than the circular aperture formed in the radially inward directed collar <b>166</b> and at least a portion of an inner surface of the rearward extending annular portion <b>168</b> contacts and circumferentially surrounds at least a portion of an outer surface of the body <b>190</b>. Preferably, the circular aperture in the rearward extending annular portion <b>168</b> of the coupling nut <b>160</b> and the portion of the body <b>190</b> that is circumferentially surrounded by the rearward extending annular portion <b>168</b> of the coupling nut <b>160</b> each have an outer diameter that is greater than the outer diameter of the flange <b>174</b> of the post <b>170</b>. Preferably, sealing member <b>180</b> also has an outer diameter that is greater than the outer diameter of the flange <b>174</b> of the post <b>170</b>. Preferably, an outer diameter of the sealing member <b>180</b> does not contact the inner surface of the rearward extending annular portion <b>168</b> of the coupling nut <b>160</b> and an annular gap extends between the outer diameter of the sealing member <b>180</b> and the inner surface of the rearward extending annular portion <b>168</b> of the coupling nut <b>160</b>. Annular gap allows for sealing member <b>180</b> to flex radially outwardly as it is being compressed axially.

In the embodiment illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, sealing member <b>180</b> that is axially compressed by the rear end facing surface <b>163</b> of the radially inward directed collar <b>166</b> and the front end facing surface <b>195</b> of the body <b>190</b> does not contact post <b>170</b> (as opposed to the embodiment illustrated in <figref idref="DRAWINGS">FIG. 12</figref> and described below).

Preferably, and as illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, the portion of the body <b>190</b> that is circumferentially surrounded by the rearward extending annular portion <b>168</b> of the coupling nut <b>160</b> comprises a plurality of contact points <b>196</b> on its outer surface, wherein at least a portion of an outer surface of the contact points contact the inner surface of the rearward extending annular portion <b>168</b> of the coupling nut <b>160</b>. For example, in a preferred embodiment, the contact points <b>196</b> comprise radially outwardly extending geometrically shaped projections, such as diamond-shaped, square-shaped, or circular-shaped projections. In a particularly preferred embodiment, and as illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, the contact points <b>196</b> on the outer surface of body <b>190</b> comprise a knurled outer surface.

Post flange <b>174</b> also preferably comprises a plurality of contact points <b>177</b> on its outer surface, wherein at least a portion of an outer surface of the contact points contact an inner surface of the coupling nut <b>160</b>. For example, in a preferred embodiment, the contact points <b>177</b> comprise radially outwardly extending geometrically shaped projections, such as diamond-shaped, square-shaped, or circular-shaped projections. In a particularly preferred embodiment, and as illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, the contact points <b>177</b> on the outer surface of post flange <b>174</b> comprise a knurled outer surface. An enlarged view of these features is illustrated in <figref idref="DRAWINGS">FIG. 4A</figref>.

Formation of radially outwardly extending geometrically shaped projections as contact points about post flange <b>174</b> and body <b>190</b> by knurling or other means provides for increased contact pressure between the radial features of the connector components when the connector is in a loose condition (as illustrated, for example, in <figref idref="DRAWINGS">FIG. 6</figref>) further restricting RF signal ingress paths from the rear of the connector coupler system. Contact points <b>177</b> and/or <b>196</b> further serve to disrupt RF signal ingress by dispersing spurious RF signals in a manner roughly analogous to the use of LO technology (low observable technology) multi-planar surfaces employed on radar reflecting ships and aircraft. A further analogy to this approach is found in RF anechoic chamber technology.

<figref idref="DRAWINGS">FIG. 5</figref> illustrates a partial cross sectional view of the connector <b>150</b> illustrated in <figref idref="DRAWINGS">FIG. 4</figref> installed on a coaxial cable and fully secured to a terminal or port <b>40</b>. In this condition, all ingress paths are fully shielded as provided by application of proper torque to connector coupler <b>160</b>.

Turning to <figref idref="DRAWINGS">FIG. 6</figref>, the connector <b>150</b> illustrated in <figref idref="DRAWINGS">FIG. 4</figref> and port <b>40</b> are illustrated where coupler <b>160</b> of connector <b>150</b> is not fully tightened thereby allowing post front end <b>172</b> (including post face) and port face <b>42</b> to be spaced apart at gap “G”. As previously described, sealing member <b>180</b> performs not only an environmental sealing function but also serves to urge coupler <b>160</b> forward against post flange <b>174</b> to aid in electrical grounding. This, in conjunction with precision engineered fits between coupling nut <b>160</b>, post <b>170</b> and body <b>190</b>, restricts RF signal ingress paths from the rear of the connector coupler system. Forming of a plurality of contact points <b>177</b> about post <b>170</b> and a plurality of contact points <b>196</b> about body <b>190</b> by knurling or other means provides for increased contact pressure between the radial features of the connector components when the connector is in a loose condition as illustrated. The RF signal ingress path is further thwarted by the increased convolutions of the coupler/body/post configuration. This is especially useful in that RF signals tend to attenuate when presented by multiple, sharp changes in direction as provided herein. Additional thwarting of the RF ingress path on the port side of the coupler system is accomplished by restricting or choking the diametral clearances between inner bore of the front end of the coupling nut (or pilot bore <b>167</b>) and major diameter port threads <b>44</b> of port <b>40</b>. Further thwarting of the RF ingress path on the port side of the coupler system is accomplished by restricting or choking the diametral clearances between threads <b>169</b> of coupler <b>160</b> and minor diameter port threads <b>44</b> of port <b>40</b>.

<figref idref="DRAWINGS">FIG. 7</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector <b>150</b> comprising an electrically conductive ground member <b>300</b> and installed on a coaxial cable <b>11</b> and fully secured to a terminal or port <b>40</b>. Ground member <b>300</b> is preferably press-fitted into pilot bore <b>167</b> of coupling nut <b>160</b> and comprises a plurality of radially inwardly biased fingers that provide electrical and mechanical communication between coupling nut <b>160</b> and port <b>40</b>. The ground member <b>300</b> is preferably made from a metallic material, such as beryllium copper and may optionally be plated with a conductive, corrosion-resistant material, such as tin. Alternatively, the ground member <b>300</b> may be a coil-type spring or alternatively, the ground member <b>300</b> may be an electrically conductive elastomer.

<figref idref="DRAWINGS">FIG. 7A</figref> illustrates side perspective and schematic end views of electrically conductive ground member <b>300</b> including radially inwardly biased fingers <b>303</b>. Ground member <b>300</b> may, as shown in <figref idref="DRAWINGS">FIG. 7A</figref>, be c-shaped and include an optional radially extending slot <b>301</b>. Alternatively, ground member <b>300</b> may entirely circumferentially surround pilot bore <b>167</b> (not shown).

<figref idref="DRAWINGS">FIG. 8</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector <b>150</b>′ comprising a coupling nut having an offset inner thread <b>161</b> and installed on a coaxial cable <b>11</b> and fully secured to a terminal or port <b>40</b>. Offset inner thread <b>161</b> is built into coupling nut <b>160</b>′ at an axis parallel to the center axis of coupling nut <b>160</b>′ but radially displaced from the center axis of coupling nut <b>160</b>′ such that the annular thickness of the coupling nut <b>160</b>′ between an inner surface and an outer surface varies circumferentially around the coupling nut <b>160</b>′. For example, as illustrated in <figref idref="DRAWINGS">FIG. 8</figref>, the annular thickness of coupling nut <b>160</b>′ at A′ is greater than the annular thickness of coupling nut <b>160</b>′ at B′. Preferably, the coupling nut <b>160</b>′ has an annular thickness that varies circumferentially around pilot bore <b>167</b> (see <figref idref="DRAWINGS">FIG. 8A</figref>, showing a posterior schematic end view of the connector illustrated in <figref idref="DRAWINGS">FIG. 8</figref>) such that the largest annular thickness of the coupling nut <b>160</b>′ around pilot bore <b>167</b> is at least 10%, more preferably at least 20%, and even more preferably at least 30% greater than the smallest annular thickness of coupling nut <b>160</b>′ around pilot bore <b>167</b>. This has the effect of purposely misaligning connector <b>150</b>′ with port <b>40</b> forcing the cable center conductor (not shown) into a side-loaded condition. In this side-loaded condition, the copper coated steel center conductor is forced to act as a spring and thereby apply a force that enhances radial contact between threads of coupling nut <b>160</b>′ and thread <b>44</b> of port <b>40</b> ensuring an electrical ground path.

<figref idref="DRAWINGS">FIG. 9</figref> illustrates a partial cross sectional view of connector <b>150</b> and an optional torque aid <b>400</b>, wherein the torque aid <b>400</b> is installed on the connector <b>150</b> and is in contact with and circumferentially surrounds at least a portion of coupling nut <b>160</b>. <figref idref="DRAWINGS">FIG. 10</figref> illustrates a schematic end view of torque aid <b>400</b>. Torque aid <b>400</b> is preferably made from a plastic material, such as acetal, and allows for the connector to be more adequately installed onto a port in limited accessibility situations by providing for improved finger grip on the coupler system. As shown in <figref idref="DRAWINGS">FIG. 10</figref>, torque aid <b>400</b> includes internal hex <b>465</b> which is configured to engage external hex <b>165</b>A of coupling nut <b>160</b> while internal ridge <b>468</b> engage grooves <b>168</b>A of coupling nut <b>160</b>. Optional radially extending slot <b>467</b> allows torque aid <b>400</b> to snap over and onto coupling nut <b>160</b>. A plurality of optional external gripping surfaces <b>469</b> provide for enhanced finger grip. Torque aid <b>400</b> is of further benefit in reducing the manufacturing cost of coupling nut <b>160</b> by eliminating the need to produce coupling nut <b>160</b> from a larger material stock size as seen in Corning Gilbert Connector GF-UR-6K currently produced for the industry.

<figref idref="DRAWINGS">FIGS. 11 and 11A</figref> illustrate an alternate embodiment, wherein <figref idref="DRAWINGS">FIG. 11</figref> illustrates a partial cross sectional view of a connector comprising a modified post <b>170</b>′ and <figref idref="DRAWINGS">FIG. 11A</figref> illustrates a schematic end view of modified post <b>170</b>′. Modified post <b>170</b>′ comprises radial knurl <b>179</b> on rear end facing surface <b>175</b> of post flange <b>174</b> that provides high pressure contact points between front end facing surface <b>165</b> of radially inward directed collar <b>166</b> of coupling nut <b>160</b> and crests of radial knurl <b>179</b>. Reducing the square inches of contact area between the surfaces increases contact pressures in PSI (pounds per square inch) when the same load is applied by the coupler system. Such increased contact pressures enhance electrical grounding characteristics.

<figref idref="DRAWINGS">FIG. 12</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector <b>150</b>″ wherein sealing member <b>180</b> is disposed between the coupling nut <b>160</b>, post <b>170</b>, and body <b>190</b>″, such that an inner surface of the sealing member <b>180</b> contacts post <b>170</b> (in contrast to the connector illustrated in <figref idref="DRAWINGS">FIG. 4</figref>, wherein an inner surface of the sealing member <b>180</b> contacts body <b>190</b>).

<figref idref="DRAWINGS">FIG. 13</figref> illustrates a partial cross sectional view of an alternate embodiment of a connector <b>150</b>′″, wherein coupling nut <b>160</b>′″ has a front end that is formed or biased radially inwardly and front end of coupling nut <b>160</b>′″ includes a plurality of slots <b>161</b>′″ extending from the front end of the coupling nut between an inner and an outer surface of the front end of the coupling nut <b>160</b>′″. The radially inwardly biased front end of coupling nut <b>160</b>′″ help insure that the threads of the coupling nut <b>160</b>′″ contact a mating port (not shown) and the slots allow for spring or flex back functionality to facilitate mating of the threads of the coupling nut with threads on a mating port (not shown).

<figref idref="DRAWINGS">FIG. 14</figref> illustrates a schematic front end view of an alternate embodiment of a coupling nut <b>160</b>″″ that can be used with one or more embodiments of connectors described herein, wherein the front end of coupling nut <b>160</b>″″ has an at least partially unrounded surface. Preferably, the at least partially unrounded surface is an inner surface on the front end of the coupling nut <b>160</b>″″ although, as shown in <figref idref="DRAWINGS">FIG. 14</figref>, both inner and outer surfaces on front end of coupling nut may be unrounded. By “unrounded” it is meant that the front end of the coupling nut includes one or more intentionally introduced deformations wherein the deformations result in the front end of the coupling nut <b>160</b>″″ having inner and/or outer surfaces that are not perfectly circular when viewed head on from the front end. For example, <figref idref="DRAWINGS">FIG. 14</figref> illustrates a coupling nut <b>160</b>″″ having a front end with intentionally introduced deformations shown as a plurality of flat spots <b>168</b>″″ (flat spots <b>168</b>″″ are shown in an exaggerated fashion for the purposes of illustration). The at least partially unrounded inner surface allow for the threads of the coupling nut <b>160</b>′″ to more positively contact a mating port (not shown).

Coaxial connectors disclosed herein can, in preferred embodiments, mitigate the effect of gapping at the connector/port interface, provide an alternative ground path, provide a means to protect from signal ingress and egress, and help ensure against further loosening of an unsecured coupler.

Unless otherwise expressly stated, it is in no way intended that any method set forth herein be construed as requiring that its steps be performed in a specific order. Accordingly, where a method claim does not actually recite an order to be followed by its steps or it is not otherwise specifically stated in the claims or descriptions that the steps are to be limited to a specific order, it is no way intended that any particular order be inferred.

It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit or scope of the invention. Since modifications combinations, sub-combinations and variations of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and their equivalents.